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Real Estate Investments (Tables) | 3 Months Ended
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Mar. 31, 2015
Real Estate [Abstract] |
Gross Carrying Value Of Company's Properties | As of March 31, 2015 and December 31, 2014, the gross carrying value of the Company’s Properties was as follows (in thousands):
| March 31, 2015 |  | December 31, 2014
Land | $ | 646,132 |  |  | $ | 669,635 |
Building and improvements | 3,313,807 |  |  | 3,409,303 |
Tenant improvements | 517,918 |  |  | 524,754 |
| 4,477,857 |  |  | 4,603,692 |
Assets held for sale - real estate investments (a) | 136,802 |  |  | 27,436 |
Total | $ | 4,614,659 |  |  | $ | 4,631,128 |
(a) | Real estate investments related to assets held for sale above represents gross real estate assets and does not include accumulated depreciation or other assets on the balance sheets of the properties held for sale.

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